Population by age groups in Ireland
Ireland: Population by age groups was 5.44 million in 2025. β² Rising
Population by age groups in Ireland, 1990β2025
Source: UNICEF.
Analysis
In 2025, population by age groups in Ireland stood at 5.44 million. That is the highest value across all 36 years on record.
Compared with earlier readings it is up 1.7% on the previous year and up 16.3% over ten years.
Over the whole period, population by age groups in Ireland peaked at 5.44 million in 2025 and was at its lowest, 3.51 million, in 1990.
Ireland ranks 48th of 74 countries on this measure, in the middle of the range.
The long-run direction has been consistently rising across the 36 years of available data.
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1990s | 3.60 million | 3.51 million | 3.73 million | 10 |
| 2000s | 4.11 million | 3.78 million | 4.52 million | 10 |
| 2010s | 4.70 million | 4.55 million | 4.94 million | 10 |
| 2020s | 5.22 million | 5.01 million | 5.44 million | 6 |
Countries ranked near Ireland
More population data for Ireland
- Population growth rate by level of development -0.455 (2100)
- Projected population under age 5 217,052 (2100)
- Population density 76.73 (2100)
- Population growth rate -0.455 (2100)
- Projected population under age 5, annual growth rate -0.1844 % change on previous year (2100)
- Africa's Development Dynamics (AfDD) Table 03 - Annual population 0.5372 Percent per annum (2030)
- Africa's Development Dynamics (AfDD) Table 05 - Demographic estimates 5,725 Persons (2050)
- Africa's Development Dynamics (AfDD) Table 05 - Demographic estimates 0.5372 % change on previous year (2030)
- Fertility and wanted fertility 1.47 (2024)
- Refugee population by country or territory of asylum 124,730 (2024)
Frequently asked questions
- What is population by age groups in Ireland?
- Population by age groups in Ireland was 5.44 million in 2025, according to UNICEF.
- What is the highest population by age groups recorded in Ireland?
- The highest recorded value was 5.44 million in 2025.
- What is the lowest population by age groups recorded in Ireland?
- The lowest recorded value was 3.51 million in 1990.
- How does Ireland rank for population by age groups?
- Ireland ranks 48th out of 74 countries with data for 2025.
- Is population by age groups rising or falling in Ireland?
- Over the last ten years it is up 16.3%. The long-run trend across the full record is rising.
- Where does this Ireland data come from?
- The figures come from UNICEF, published as part of Population by age groups. Statizoid updates them automatically from the source API.
Download this data
CSV Β· JSON β 36 observations, free to reuse under UNICEF Terms of Use (attribution required).